Musk wants electric cars to be powered by the sun, rather than dirty electricity from the grid. This is not so far fetched from a man who envisions holidays in space and solar powered jet liners… [...]"We must have sustainable energy in consumption and production or we will face massive economic collapse," he said. "That's a problem we know we must solve one way or another. [...]
"Why are we running this massive chemical experiment on our oceans and atmosphere when we know we're going to have to find an alternative anyway?"
The alternative is solar, said Musk. "If you took just a small section of US, a 100 miles by 100 miles corner of Utah or Nevada and carpeted it with high efficiency panels you could supply the electricity for the whole United States."
But really, you should go read the whole thing.